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Java FTP client, Java FTP NIO file system, Groovy FTP client
package org.xbib.io.ftp.fs;
import org.xbib.io.ftp.client.FTPFile;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.net.URI;
import java.nio.channels.SeekableByteChannel;
import java.nio.file.AccessDeniedException;
import java.nio.file.AccessMode;
import java.nio.file.CopyOption;
import java.nio.file.DirectoryNotEmptyException;
import java.nio.file.DirectoryStream;
import java.nio.file.DirectoryStream.Filter;
import java.nio.file.FileAlreadyExistsException;
import java.nio.file.FileStore;
import java.nio.file.FileSystem;
import java.nio.file.LinkOption;
import java.nio.file.NoSuchFileException;
import java.nio.file.NotLinkException;
import java.nio.file.OpenOption;
import java.nio.file.Path;
import java.nio.file.PathMatcher;
import java.nio.file.StandardOpenOption;
import java.nio.file.WatchService;
import java.nio.file.attribute.FileAttribute;
import java.nio.file.attribute.FileTime;
import java.nio.file.attribute.GroupPrincipal;
import java.nio.file.attribute.PosixFileAttributes;
import java.nio.file.attribute.PosixFilePermission;
import java.nio.file.attribute.UserPrincipal;
import java.nio.file.attribute.UserPrincipalLookupService;
import java.time.ZonedDateTime;
import java.util.Arrays;
import java.util.Collections;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.concurrent.atomic.AtomicBoolean;
import java.util.regex.Pattern;
/**
* An FTP file system.
*/
class FTPFileSystem extends FileSystem {
static final String CURRENT_DIR = ".";
static final String PARENT_DIR = "..";
private static final Set SUPPORTED_FILE_ATTRIBUTE_VIEWS = Collections
.unmodifiableSet(new HashSet<>(Arrays.asList("basic", "owner", "posix")));
private static final Set BASIC_ATTRIBUTES = Collections.unmodifiableSet(new HashSet<>(Arrays.asList(
"basic:lastModifiedTime", "basic:lastAccessTime", "basic:creationTime", "basic:size",
"basic:isRegularFile", "basic:isDirectory", "basic:isSymbolicLink", "basic:isOther", "basic:fileKey")));
private static final Set OWNER_ATTRIBUTES = Collections.unmodifiableSet(new HashSet<>(Collections.singletonList(
"owner:owner")));
private static final Set POSIX_ATTRIBUTES = Collections.unmodifiableSet(new HashSet<>(Arrays.asList(
"posix:lastModifiedTime", "posix:lastAccessTime", "posix:creationTime", "posix:size",
"posix:isRegularFile", "posix:isDirectory", "posix:isSymbolicLink", "posix:isOther", "posix:fileKey",
"posix:owner", "posix:group", "posix:permissions")));
private final FTPFileSystemProvider provider;
private final Iterable rootDirectories;
private final FileStore fileStore;
private final Iterable fileStores;
private final FTPClientPool clientPool;
private final URI uri;
private final String defaultDirectory;
private final FTPFileStrategy ftpFileStrategy;
private final AtomicBoolean open = new AtomicBoolean(true);
FTPFileSystem(FTPFileSystemProvider provider, URI uri, FTPEnvironment env) throws IOException {
this.provider = Objects.requireNonNull(provider);
this.rootDirectories = Collections.singleton(new FTPPath(this, "/"));
this.fileStore = new FTPFileStore(this);
this.fileStores = Collections.singleton(fileStore);
this.clientPool = new FTPClientPool(uri.getHost(), uri.getPort(), env);
this.uri = Objects.requireNonNull(uri);
try (FTPClientPool.Client client = clientPool.get()) {
this.defaultDirectory = client.pwd();
this.ftpFileStrategy = FTPFileStrategy.getInstance(client);
}
}
static String getFileName(FTPFile ftpFile) {
String fileName = ftpFile.getName();
if (fileName == null) {
return null;
}
int index = fileName.lastIndexOf('/');
return index == -1 || index == fileName.length() - 1 ? fileName : fileName.substring(index + 1);
}
@Override
public FTPFileSystemProvider provider() {
return provider;
}
@Override
public void close() throws IOException {
if (open.getAndSet(false)) {
provider.removeFileSystem(uri);
clientPool.close();
}
}
@Override
public boolean isOpen() {
return open.get();
}
@Override
public boolean isReadOnly() {
return false;
}
@Override
public String getSeparator() {
return "/";
}
@Override
public Iterable getRootDirectories() {
return rootDirectories;
}
@Override
public Iterable getFileStores() {
return fileStores;
}
@Override
public Set supportedFileAttributeViews() {
return SUPPORTED_FILE_ATTRIBUTE_VIEWS;
}
@Override
public Path getPath(String first, String... more) {
StringBuilder sb = new StringBuilder(first);
for (String s : more) {
sb.append("/").append(s);
}
return new FTPPath(this, sb.toString());
}
@Override
public PathMatcher getPathMatcher(String syntaxAndPattern) {
final Pattern pattern = PathMatcherSupport.toPattern(syntaxAndPattern);
return new PathMatcher() {
@Override
public boolean matches(Path path) {
return pattern.matcher(path.toString()).matches();
}
};
}
@Override
public UserPrincipalLookupService getUserPrincipalLookupService() {
throw Messages.unsupportedOperation(FileSystem.class, "getUserPrincipalLookupService");
}
@Override
public WatchService newWatchService() throws IOException {
throw Messages.unsupportedOperation(FileSystem.class, "newWatchService");
}
void keepAlive() throws IOException {
clientPool.keepAlive();
}
boolean isSecure() {
return clientPool.isSecure();
}
URI toUri(FTPPath path) {
FTPPath absPath = toAbsolutePath(path).normalize();
return toUri(absPath.path());
}
URI toUri(String path) {
return URISupport.create(uri.getScheme(), uri.getUserInfo(), uri.getHost(), uri.getPort(), path, null, null);
}
FTPPath toAbsolutePath(FTPPath path) {
if (path.isAbsolute()) {
return path;
}
return new FTPPath(this, defaultDirectory + "/" + path.path());
}
FTPPath toRealPath(FTPPath path, LinkOption... options) throws IOException {
boolean followLinks = LinkOptionSupport.followLinks(options);
try (FTPClientPool.Client client = clientPool.get()) {
return toRealPath(client, path, followLinks).ftpPath;
}
}
private FTPPathAndFilePair toRealPath(FTPClientPool.Client client, FTPPath path, boolean followLinks) throws IOException {
FTPPath absPath = toAbsolutePath(path).normalize();
// call getFTPFile to verify the file exists
FTPFile ftpFile = getFTPFile(client, absPath);
if (followLinks && isPossibleSymbolicLink(ftpFile)) {
FTPFile link = getLink(client, ftpFile, absPath);
if (link != null) {
return toRealPath(client, new FTPPath(this, link.getLink()), followLinks);
}
}
return new FTPPathAndFilePair(absPath, ftpFile);
}
private boolean isPossibleSymbolicLink(FTPFile ftpFile) {
return ftpFile.isSymbolicLink() || (ftpFile.isDirectory() && CURRENT_DIR.equals(getFileName(ftpFile)));
}
String toString(FTPPath path) {
return path.path();
}
InputStream newInputStream(FTPPath path, OpenOption... options) throws IOException {
OpenOptions openOptions = OpenOptions.forNewInputStream(options);
try (FTPClientPool.Client client = clientPool.get()) {
return newInputStream(client, path, openOptions);
}
}
private InputStream newInputStream(FTPClientPool.Client client, FTPPath path, OpenOptions options) throws IOException {
assert options.read;
return client.newInputStream(path.path(), options);
}
OutputStream newOutputStream(FTPPath path, OpenOption... options) throws IOException {
OpenOptions openOptions = OpenOptions.forNewOutputStream(options);
try (FTPClientPool.Client client = clientPool.get()) {
return newOutputStream(client, path, false, openOptions).out;
}
}
private FTPFileAndOutputStreamPair newOutputStream(FTPClientPool.Client client, FTPPath path, boolean requireFTPFile, OpenOptions options) throws IOException {
// retrieve the file unless create is true and createNew is false, because then the file can be created
FTPFile ftpFile = null;
if (!options.create || options.createNew) {
ftpFile = findFTPFile(client, path);
if (ftpFile != null && ftpFile.isDirectory()) {
throw Messages.fileSystemProvider().isDirectory(path.path());
}
if (!options.createNew && ftpFile == null) {
throw new NoSuchFileException(path.path());
} else if (options.createNew && ftpFile != null) {
throw new FileAlreadyExistsException(path.path());
}
}
// else the file can be created if necessary
if (ftpFile == null && requireFTPFile) {
ftpFile = findFTPFile(client, path);
}
OutputStream out = client.newOutputStream(path.path(), options);
return new FTPFileAndOutputStreamPair(ftpFile, out);
}
SeekableByteChannel newByteChannel(FTPPath path, Set options, FileAttribute... attrs) throws IOException {
if (attrs.length > 0) {
throw Messages.fileSystemProvider().unsupportedCreateFileAttribute(attrs[0].name());
}
OpenOptions openOptions = OpenOptions.forNewByteChannel(options);
try (FTPClientPool.Client client = clientPool.get()) {
if (openOptions.read) {
// use findFTPFile instead of getFTPFile, to let the opening of the stream provide the correct error message
FTPFile ftpFile = findFTPFile(client, path);
InputStream in = newInputStream(client, path, openOptions);
long size = ftpFile == null ? 0 : ftpFile.getSize();
return FileSystemProviderSupport.createSeekableByteChannel(in, size);
}
// if append then we need the FTP file, to find the initial position of the channel
boolean requireFTPFile = openOptions.append;
FTPFileAndOutputStreamPair outPair = newOutputStream(client, path, requireFTPFile, openOptions);
long initialPosition = outPair.ftpFile == null ? 0 : outPair.ftpFile.getSize();
return FileSystemProviderSupport.createSeekableByteChannel(outPair.out, initialPosition);
}
}
DirectoryStream newDirectoryStream(final FTPPath path, Filter filter) throws IOException {
List children;
try (FTPClientPool.Client client = clientPool.get()) {
children = ftpFileStrategy.getChildren(client, path);
}
return new FTPPathDirectoryStream(path, children, filter);
}
void createDirectory(FTPPath path, FileAttribute... attrs) throws IOException {
if (attrs.length > 0) {
throw Messages.fileSystemProvider().unsupportedCreateFileAttribute(attrs[0].name());
}
try (FTPClientPool.Client client = clientPool.get()) {
client.mkdir(path.path());
}
}
void delete(FTPPath path) throws IOException {
try (FTPClientPool.Client client = clientPool.get()) {
FTPFile ftpFile = getFTPFile(client, path);
boolean isDirectory = ftpFile.isDirectory();
client.delete(path.path(), isDirectory);
}
}
FTPPath readSymbolicLink(FTPPath path) throws IOException {
try (FTPClientPool.Client client = clientPool.get()) {
FTPFile ftpFile = getFTPFile(client, path);
FTPFile link = getLink(client, ftpFile, path);
if (link == null) {
throw new NotLinkException(path.path());
}
return path.resolveSibling(link.getLink());
}
}
void copy(FTPPath source, FTPPath target, CopyOption... options) throws IOException {
boolean sameFileSystem = source.getFileSystem() == target.getFileSystem();
CopyOptions copyOptions = CopyOptions.forCopy(options);
try (FTPClientPool.Client client = clientPool.get()) {
// get the FTP file to determine whether a directory needs to be created or a file needs to be copied
// Files.copy specifies that for links, the final target must be copied
FTPPathAndFilePair sourcePair = toRealPath(client, source, true);
if (!sameFileSystem) {
copyAcrossFileSystems(client, source, sourcePair.ftpFile, target, copyOptions);
return;
}
try {
if (sourcePair.ftpPath.path().equals(toRealPath(client, target, true).ftpPath.path())) {
// non-op, don't do a thing as specified by Files.copy
return;
}
} catch (NoSuchFileException e) {
// the target does not exist or either path is an invalid link, ignore the error and continue
}
FTPFile targetFtpFile = findFTPFile(client, target);
if (targetFtpFile != null) {
if (copyOptions.replaceExisting) {
client.delete(target.path(), targetFtpFile.isDirectory());
} else {
throw new FileAlreadyExistsException(target.path());
}
}
if (sourcePair.ftpFile.isDirectory()) {
client.mkdir(target.path());
} else {
try (FTPClientPool.Client client2 = clientPool.getOrCreate()) {
copyFile(client, source, client2, target, copyOptions);
}
}
}
}
private void copyAcrossFileSystems(FTPClientPool.Client sourceClient, FTPPath source, FTPFile sourceFtpFile, FTPPath target, CopyOptions options)
throws IOException {
try (FTPClientPool.Client targetClient = target.getFileSystem().clientPool.getOrCreate()) {
FTPFile targetFtpFile = findFTPFile(targetClient, target);
if (targetFtpFile != null) {
if (options.replaceExisting) {
targetClient.delete(target.path(), targetFtpFile.isDirectory());
} else {
throw new FileAlreadyExistsException(target.path());
}
}
if (sourceFtpFile.isDirectory()) {
sourceClient.mkdir(target.path());
} else {
copyFile(sourceClient, source, targetClient, target, options);
}
}
}
private void copyFile(FTPClientPool.Client sourceClient, FTPPath source, FTPClientPool.Client targetClient, FTPPath target, CopyOptions options) throws IOException {
OpenOptions inOptions = OpenOptions.forNewInputStream(options.toOpenOptions(StandardOpenOption.READ));
OpenOptions outOptions = OpenOptions
.forNewOutputStream(options.toOpenOptions(StandardOpenOption.WRITE, StandardOpenOption.CREATE));
try (InputStream in = sourceClient.newInputStream(source.path(), inOptions)) {
targetClient.storeFile(target.path(), in, outOptions, outOptions.options);
}
}
void move(FTPPath source, FTPPath target, CopyOption... options) throws IOException {
boolean sameFileSystem = source.getFileSystem() == target.getFileSystem();
CopyOptions copyOptions = CopyOptions.forMove(sameFileSystem, options);
try (FTPClientPool.Client client = clientPool.get()) {
if (!sameFileSystem) {
FTPFile ftpFile = getFTPFile(client, source);
if (getLink(client, ftpFile, source) != null) {
throw new IOException(FTPMessages.copyOfSymbolicLinksAcrossFileSystemsNotSupported());
}
copyAcrossFileSystems(client, source, ftpFile, target, copyOptions);
client.delete(source.path(), ftpFile.isDirectory());
return;
}
try {
if (isSameFile(client, source, target)) {
// non-op, don't do a thing as specified by Files.move
return;
}
} catch (NoSuchFileException e) {
// the source or target does not exist or either path is an invalid link
// call getFTPFile to ensure the source file exists
// ignore any error to target or if the source link is invalid
getFTPFile(client, source);
}
if (toAbsolutePath(source).parentPath() == null) {
// cannot move or rename the root
throw new DirectoryNotEmptyException(source.path());
}
FTPFile targetFTPFile = findFTPFile(client, target);
if (copyOptions.replaceExisting && targetFTPFile != null) {
client.delete(target.path(), targetFTPFile.isDirectory());
}
client.rename(source.path(), target.path());
}
}
boolean isSameFile(FTPPath path, FTPPath path2) throws IOException {
if (path.getFileSystem() != path2.getFileSystem()) {
return false;
}
if (path.equals(path2)) {
return true;
}
try (FTPClientPool.Client client = clientPool.get()) {
return isSameFile(client, path, path2);
}
}
private boolean isSameFile(FTPClientPool.Client client, FTPPath path, FTPPath path2) throws IOException {
if (path.equals(path2)) {
return true;
}
return toRealPath(client, path, true).ftpPath.path().equals(toRealPath(client, path2, true).ftpPath.path());
}
boolean isHidden(FTPPath path) throws IOException {
// call getFTPFile to check for existence
try (FTPClientPool.Client client = clientPool.get()) {
getFTPFile(client, path);
}
String fileName = path.fileName();
return !CURRENT_DIR.equals(fileName) && !PARENT_DIR.equals(fileName) && fileName.startsWith(".");
}
FileStore getFileStore(FTPPath path) throws IOException {
// call getFTPFile to check existence of the path
try (FTPClientPool.Client client = clientPool.get()) {
getFTPFile(client, path);
}
return fileStore;
}
void checkAccess(FTPPath path, AccessMode... modes) throws IOException {
try (FTPClientPool.Client client = clientPool.get()) {
FTPFile ftpFile = getFTPFile(client, path);
for (AccessMode mode : modes) {
if (!hasAccess(ftpFile, mode)) {
throw new AccessDeniedException(path.path());
}
}
}
}
private boolean hasAccess(FTPFile ftpFile, AccessMode mode) {
switch (mode) {
case READ:
return ftpFile.hasPermission(FTPFile.USER_ACCESS, FTPFile.READ_PERMISSION);
case WRITE:
return ftpFile.hasPermission(FTPFile.USER_ACCESS, FTPFile.WRITE_PERMISSION);
case EXECUTE:
return ftpFile.hasPermission(FTPFile.USER_ACCESS, FTPFile.EXECUTE_PERMISSION);
default:
return false;
}
}
PosixFileAttributes readAttributes(FTPPath path, LinkOption... options) throws IOException {
boolean followLinks = LinkOptionSupport.followLinks(options);
try (FTPClientPool.Client client = clientPool.get()) {
FTPPathAndFilePair pair = toRealPath(client, path, followLinks);
ZonedDateTime lastModified = client.mdtm(pair.ftpPath.path());
FTPFile link = followLinks ? null : getLink(client, pair.ftpFile, path);
FTPFile ftpFile = link == null ? pair.ftpFile : link;
return new FTPPathFileAttributes(ftpFile, lastModified);
}
}
Map readAttributes(FTPPath path, String attributes, LinkOption... options) throws IOException {
String view;
int pos = attributes.indexOf(':');
if (pos == -1) {
view = "basic";
attributes = "basic:" + attributes;
} else {
view = attributes.substring(0, pos);
}
if (!SUPPORTED_FILE_ATTRIBUTE_VIEWS.contains(view)) {
throw Messages.fileSystemProvider().unsupportedFileAttributeView(view);
}
Set allowedAttributes;
if (attributes.startsWith("basic:")) {
allowedAttributes = BASIC_ATTRIBUTES;
} else if (attributes.startsWith("owner:")) {
allowedAttributes = OWNER_ATTRIBUTES;
} else if (attributes.startsWith("posix:")) {
allowedAttributes = POSIX_ATTRIBUTES;
} else {
// should not occur
throw Messages.fileSystemProvider().unsupportedFileAttributeView(attributes.substring(0, attributes.indexOf(':')));
}
Map result = getAttributeMap(attributes, allowedAttributes);
PosixFileAttributes posixAttributes = readAttributes(path, options);
for (Map.Entry entry : result.entrySet()) {
switch (entry.getKey()) {
case "basic:lastModifiedTime":
case "posix:lastModifiedTime":
entry.setValue(posixAttributes.lastModifiedTime());
break;
case "basic:lastAccessTime":
case "posix:lastAccessTime":
entry.setValue(posixAttributes.lastAccessTime());
break;
case "basic:creationTime":
case "posix:creationTime":
entry.setValue(posixAttributes.creationTime());
break;
case "basic:size":
case "posix:size":
entry.setValue(posixAttributes.size());
break;
case "basic:isRegularFile":
case "posix:isRegularFile":
entry.setValue(posixAttributes.isRegularFile());
break;
case "basic:isDirectory":
case "posix:isDirectory":
entry.setValue(posixAttributes.isDirectory());
break;
case "basic:isSymbolicLink":
case "posix:isSymbolicLink":
entry.setValue(posixAttributes.isSymbolicLink());
break;
case "basic:isOther":
case "posix:isOther":
entry.setValue(posixAttributes.isOther());
break;
case "basic:fileKey":
case "posix:fileKey":
entry.setValue(posixAttributes.fileKey());
break;
case "owner:owner":
case "posix:owner":
entry.setValue(posixAttributes.owner());
break;
case "posix:group":
entry.setValue(posixAttributes.group());
break;
case "posix:permissions":
entry.setValue(posixAttributes.permissions());
break;
default:
// should not occur
throw new IllegalStateException("unexpected attribute name: " + entry.getKey());
}
}
return result;
}
private Map getAttributeMap(String attributes, Set allowedAttributes) {
int indexOfColon = attributes.indexOf(':');
String prefix = attributes.substring(0, indexOfColon + 1);
attributes = attributes.substring(indexOfColon + 1);
String[] attributeList = attributes.split(",");
Map result = new HashMap<>(allowedAttributes.size());
for (String attribute : attributeList) {
String prefixedAttribute = prefix + attribute;
if (allowedAttributes.contains(prefixedAttribute)) {
result.put(prefixedAttribute, null);
} else if ("*".equals(attribute)) {
for (String s : allowedAttributes) {
result.put(s, null);
}
} else {
throw Messages.fileSystemProvider().unsupportedFileAttribute(attribute);
}
}
return result;
}
FTPFile getFTPFile(FTPPath path) throws IOException {
try (FTPClientPool.Client client = clientPool.get()) {
return getFTPFile(client, path);
}
}
private FTPFile getFTPFile(FTPClientPool.Client client, FTPPath path) throws IOException {
return ftpFileStrategy.getFTPFile(client, path);
}
private FTPFile findFTPFile(FTPClientPool.Client client, FTPPath path) throws IOException {
try {
return getFTPFile(client, path);
} catch (NoSuchFileException e) {
return null;
}
}
private FTPFile getLink(FTPClientPool.Client client, FTPFile ftpFile, FTPPath path) throws IOException {
return ftpFileStrategy.getLink(client, ftpFile, path);
}
long getTotalSpace() {
// FTPClient does not support retrieving the total space
return Long.MAX_VALUE;
}
long getUsableSpace() {
// FTPClient does not support retrieving the usable space
return Long.MAX_VALUE;
}
long getUnallocatedSpace() {
// FTPClient does not support retrieving the unallocated space
return Long.MAX_VALUE;
}
private static final class FTPPathAndFilePair {
private final FTPPath ftpPath;
private final FTPFile ftpFile;
private FTPPathAndFilePair(FTPPath ftpPath, FTPFile ftpFile) {
this.ftpPath = ftpPath;
this.ftpFile = ftpFile;
}
}
private static final class FTPFileAndOutputStreamPair {
private final FTPFile ftpFile;
private final OutputStream out;
private FTPFileAndOutputStreamPair(FTPFile ftpFile, OutputStream out) {
this.ftpFile = ftpFile;
this.out = out;
}
}
private static final class FTPPathDirectoryStream extends AbstractDirectoryStream {
private final FTPPath path;
private final List files;
private Iterator iterator;
private FTPPathDirectoryStream(FTPPath path, List files, Filter filter) {
super(filter);
this.path = path;
this.files = files;
}
@Override
protected void setupIteration() {
iterator = files.iterator();
}
@Override
protected Path getNext() throws IOException {
return iterator.hasNext() ? path.resolve(getFileName(iterator.next())) : null;
}
}
private static final class FTPPathFileAttributes implements PosixFileAttributes {
private static final FileTime EPOCH = FileTime.fromMillis(0L);
private final FTPFile ftpFile;
private final FileTime lastModified;
private FTPPathFileAttributes(FTPFile ftpFile, ZonedDateTime lastModified) {
this.ftpFile = ftpFile;
if (lastModified == null) {
ZonedDateTime timestamp = ftpFile.getTimestamp();
this.lastModified = timestamp == null ? EPOCH : FileTime.from(timestamp.toInstant());
} else {
this.lastModified = FileTime.from(lastModified.toInstant());
}
}
@Override
public UserPrincipal owner() {
String user = ftpFile.getUser();
return user == null ? null : new SimpleUserPrincipal(user);
}
@Override
public GroupPrincipal group() {
String group = ftpFile.getGroup();
return group == null ? null : new SimpleGroupPrincipal(group);
}
@Override
public Set permissions() {
Set permissions = EnumSet.noneOf(PosixFilePermission.class);
addPermissionIfSet(ftpFile, FTPFile.USER_ACCESS, FTPFile.READ_PERMISSION, PosixFilePermission.OWNER_READ, permissions);
addPermissionIfSet(ftpFile, FTPFile.USER_ACCESS, FTPFile.WRITE_PERMISSION, PosixFilePermission.OWNER_WRITE, permissions);
addPermissionIfSet(ftpFile, FTPFile.USER_ACCESS, FTPFile.EXECUTE_PERMISSION, PosixFilePermission.OWNER_EXECUTE, permissions);
addPermissionIfSet(ftpFile, FTPFile.GROUP_ACCESS, FTPFile.READ_PERMISSION, PosixFilePermission.GROUP_READ, permissions);
addPermissionIfSet(ftpFile, FTPFile.GROUP_ACCESS, FTPFile.WRITE_PERMISSION, PosixFilePermission.GROUP_WRITE, permissions);
addPermissionIfSet(ftpFile, FTPFile.GROUP_ACCESS, FTPFile.EXECUTE_PERMISSION, PosixFilePermission.GROUP_EXECUTE, permissions);
addPermissionIfSet(ftpFile, FTPFile.WORLD_ACCESS, FTPFile.READ_PERMISSION, PosixFilePermission.OTHERS_READ, permissions);
addPermissionIfSet(ftpFile, FTPFile.WORLD_ACCESS, FTPFile.WRITE_PERMISSION, PosixFilePermission.OTHERS_WRITE, permissions);
addPermissionIfSet(ftpFile, FTPFile.WORLD_ACCESS, FTPFile.EXECUTE_PERMISSION, PosixFilePermission.OTHERS_EXECUTE, permissions);
return permissions;
}
private void addPermissionIfSet(FTPFile ftpFile, int access, int permission, PosixFilePermission value,
Set permissions) {
if (ftpFile.hasPermission(access, permission)) {
permissions.add(value);
}
}
@Override
public FileTime lastModifiedTime() {
return lastModified;
}
@Override
public FileTime lastAccessTime() {
return lastModifiedTime();
}
@Override
public FileTime creationTime() {
return lastModifiedTime();
}
@Override
public boolean isRegularFile() {
return ftpFile.isFile();
}
@Override
public boolean isDirectory() {
return ftpFile.isDirectory();
}
@Override
public boolean isSymbolicLink() {
return ftpFile.isSymbolicLink();
}
@Override
public boolean isOther() {
return false;
}
@Override
public long size() {
return ftpFile.getSize();
}
@Override
public Object fileKey() {
return null;
}
}
}
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